Nouns

(n)brotherhoodthe kinship relation between a male offspring and the siblings
(n)brotherhood, fraternity, sodalitypeople engaged in a particular occupation“the medical fraternity”
(n)brotherhoodthe feeling that men should treat one another like brothers
(n)union, labor union, trade union, trades union, brotherhoodan organization of employees formed to bargain with the employer“you have to join the union in order to get a job”